My current wheels are approaching 70,000 miles (well over 100,000 km) using A23 (black) on Campy Record hubs. OC rim for the rear wheel. 32 spoke front and rear. My riding weight is 175 lb (80 kg). Zero issues, though the labels have faded from all that time in the sun. My experience with Velocity Aerohead OC rims had spoke hole cracks develop at 10K miles on the first rim, 35K miles on the second rim, and 55K miles on the third. The word on the street was that the early production rims were too light but that as the extrusion dies wore, the rim wall thickness increased and durability likewise. That certainly was my experience. The second and third rims were heavier than the first.I've built wheels for my wife using both the A23 and the H Son Archetype and the Archetype appears to be a better rim and easier to build, at least to me, though I know there are some here who favor the A23. If you can get past the color, that would be my choice. Even their Black rims are very subdued as far as graphics are concerned.